cryptoProeasy

Смежный (Contiguous)

duckerz

Task: Decrypt ciphertext encrypted with affine cipher where parameters a=7 and b=20 are known. Solution: Calculate modular inverse of a (a^(-1)=15) and apply decryption formula D(y) = a^(-1) * (y - b) mod 26.

$ ls tags/ techniques/
modular_arithmeticclassical_cryptoaffine_cipher
affine_decryptionmodular_inverse
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